class Person:
    def __init__(self, name):
        self.name = name

    def greet(self):
        return f"Hi, it's {self.name}"
    
class Employee(Person):
    def __init__(self, name, job_title):
        self.name = name
        self.job_title = job_title

employee = Employee('John', 'Python Developer')
print(employee.greet())
print(isinstance(employee, Person))
print(issubclass(Employee, Person))